CN102634381B - System and method for treating benzene-contained separating water of coking benzol - Google Patents
System and method for treating benzene-contained separating water of coking benzol Download PDFInfo
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Abstract
The invention belongs to the technical field of purifying coke oven gas, and relates to a system and method for treating benzene-contained separating water of coking benzol. The method comprises the following steps that: benzene-contained and oil-contained separating water which is separated in a benzol production process is fed to an inlet pipeline of a circulating ammonia pump through a pipeline; the benzene-contained and oil-contained separating water reaches the circulating ammonia pump through an inlet of the circulating ammonia pump; raw coke oven gas reaches a gas collecting pipe of a coke oven for spraying by pressurizing the circulating ammonia pump; heat exchange is carried out on the raw coke oven gas in the gas collecting pipe at a temperature of 780-850 DEG C; benzene matter is separated from water so as to rapidly volatilize to mix with gas due to heating effects of the raw coke oven gas at a high temperature, and enters a next benzene washing process with gas; the separating water in which the benzene is removed is mixed with an ammonia tar system; and finally, ammonia enters an ammonia vaporizing system for treatment and oil matter enters a tar system. According to the invention, the treatment efficiency of the benzene-contained separating water is high and the treatment speed of the benzene-contained separating water is high. Meanwhile, the conventional equipment and device in coking can be sufficiently used, so that the operation cost is low, the operation field conditions is improved, and the yield of chemical product of benzol is increased.
Description
Technical field
The invention belongs to the coke oven gas purification technical field, a kind of coking crude benzene is containing benzene Separation of Water treatment system and method specifically.
Background technology
Coke-oven plant is in gas purification crude benzol production process, owing to adopting washing oil to spray to organism such as the benzene in coal gas, toluene and naphthalenes absorptions, absorbed after the organic washing oil heating such as benzene, methylbenzene and naphthalene and be sent to debenzolizing tower and take off benzene, take off the naphthalene processing.The domestic de-benzene process at debenzolizing tower mainly contains two kinds at present, and a kind of is to adopt steam to carry out the malleation distillation, passes into steam from tower bottom and directly steams and blow, and the last Separation of Water of this technique is more; Another kind is vacuum distillation, from top of tower, adopts vacuum pump to extract certain vacuum tightness, and benzene, naphthalene are separated from washing oil, and the water phase separated that this kind of technique is finally separated is to few.But no matter be to adopt which kind of technique, finally all can produce Separation of Water.In addition, owing to adopting washing oil to be washed benzene, wash the oil-containing water of condensation of coal gas condensation after the benzene tower and enter sloptank, be sent to the washing oil groove after collection and carry out static dehydration, when this part Separation of Water contains benzene, also contain the washing oil of part.What crude benzol production at present produced is all to adopt pumping toward inhaling gas line (after being effuser containing the benzene Separation of Water, one section gas line before gas-liquid separator) or mechanizeding ammonia clarifying groove sneak in the ammonia water and tar oil system, owing to inhaling in gas line gas temperature at 78-82 ℃, the ammonia water and tar oil mixeding liquid temperature is at 75-80 ℃, temperature is relatively all lower, lower than the boiling point of benzene, methylbenzene, enter rear volatilization containing the benzene Separation of Water slower.And it is nearer apart from mechanizeding ammonia clarifying groove (ammonia water and tar oil separator tank) to inhale gas line, also fully do not volatilize and just with ammonia water and tar oil, arrive mechanizeding ammonia clarifying groove containing the benzene in the benzene Separation of Water, methylbenzene, in the long-time static sepn process of clarifying tank, in Separation of Water, the volatile matter such as remaining benzene volatilizees in a large number, with exhaust emissions in atmosphere, environment is on every side caused to severe contamination, and the volatilization of a large amount of benzene gas, cause valuable benzene to waste.Overflow to again the cyclic ammonia water medial launder finally by crossing the static ammoniacal liquor of separating of clarifying tank, then by the past effuser of cyclic ammonia water pumping.
Chinese patent " a kind of water saving, energy-conservation and reduce coke oven gas purification novel process and the device of the equipment corrosion " patent No. is: 200910248854.0, this technique and device adopt the crude benzol Separation of Water in the crude benzol water distilling apparatus to be sent to wash the final cooling tower before benzene to use as the circulation flushing liquor, cold circulation fluid at end in the dilution final cooling tower, the cold circulation fluid at end in this process using crude benzol Separation of Water dilution final cooling tower.Because the effect of diluting has reduced concentration sour in whole cold circulation fluid to a certain extent, the last rear unnecessary circulation fluid that circulates in final cooling tower is sent to sulphur ammonium operation as the complex acid of ammonium sulfate device and sprays the saturex wash water.This technique is to adopt the crude benzol Separation of Water as the final cooling tower flushing liquor, because the crude benzol Separation of Water contains oil greatly, after entering the final cooling tower circulation, be sent to sulphur ammonium operation, make a large amount of washing oil to sulphur ammonium saturex, make ammonium sulfate liquor band oil serious, affect the quality of sulphur ammonium, serious meeting makes finished product ammonium sulfate products blackout.In addition, due at final cooling tower as flushing liquor, temperature is at 25-27 ℃, and temperature is almost in the normal temperature state, and a large amount of benzene classes in Separation of Water, oily substance are stayed in flushing liquor all the time, being sent to sulphur ammonium complex acid uses, in the complex acid process, tank solution is stored in the ammonium sulfate liquor storage tank, under the mother liquor effect of 50-55 ℃, the effusion of easily volatilizing of the volatile matter such as benzene, the environment around polluting.
Chinese patent " a kind of coking indirect final cooling tower circulation washing process " patent No. is: 200910067457.3, this invention relates to a kind of coking indirect final cooling tower circulation washing process, crude benzol Separation of Water and tar are sprayed in final cooling tower as mixing, washing liquid, finally the flushing liquor after the circulation flows into the solution circulated groove, unnecessary flushing liquor is again by the cold mechanizeding ammonia clarifying groove of the past drum of pumping, this technique is because flushing liquor finally enters mechanizeding ammonia clarifying groove, in mechanizeding ammonia clarifying groove due to stop, rest time is longer, in groove, be subject to temperature the ammoniacal liquor effect of 75-80 ℃, benzene class material in flushing liquor easily evaporate in atmosphere, environment around polluting, waste a large amount of resources, cause the crude benzol Separation of Water to can not get effective processing.
Summary of the invention
Technical problem to be solved by this invention is, overcome the shortcoming of prior art, provide a kind of coking crude benzene containing benzene Separation of Water treatment system and method, the efficiency of removing benzene, naphthalene is high, can not produce secondary pollution, solve Separation of Water in the past to the benzene gas pollution problem of inhaling gas line or mechanizeding ammonia clarifying groove and producing simultaneously.
The technical scheme that the present invention solves above technical problem is:
A kind of coking crude benzene is containing benzene Separation of Water treatment system, comprise underground emptying groove, oil-circulating ammonia water tank, coke oven collecting main and cyclic ammonia water pump, the cyclic ammonia water pump is arranged on the cyclic ammonia water pipe that oil-circulating ammonia water tank is connected to coke oven collecting main, the front and back of cyclic ammonia water pipe cocycle aqua ammonia pump all are provided with valve, the fluid inlet that underground emptying groove has connects crude benzol Separation of Water blow-down pipe, and the crude benzol Separation of Water containing the benzene oil-containing that crude benzol Separation of Water blow-down pipe carries the crude benzol production process to separate is to underground emptying groove; The crude benzol Separation of Water transfer lime that is connected to underground emptying groove inner bottom part is connected to the import of cyclic ammonia water pump, be provided with vacuum primingpump on crude benzol Separation of Water transfer lime, crude benzol Separation of Water transfer lime between vacuum primingpump and cyclic ammonia water pump is provided with control valve, and the cyclic ammonia water pump is delivered to coke oven collecting main to the crude benzol Separation of Water with ammoniacal liquor; The outlet of coke oven collecting main connects gas-liquid separator, the outlet at bottom of gas-liquid separator connects the ammoniacal liquor clarifying tank by the mixed solution pipeline, the top outlet of gas-liquid separator connects gas blower by cooling oil eliminator, the outlet at bottom of ammoniacal liquor clarifying tank is connected to the tar medial launder, and the top outlet of ammoniacal liquor clarifying tank is connected to oil-circulating ammonia water tank; The gas blower outlet connects successively thionizer, sulphur ammonium tower and washes the benzene tower, the outlet at bottom of washing the benzene tower is connected to debenzolizing tower by rich oil pump and oil gas heat exchanger successively, the top exit of debenzolizing tower is connected to the light benzene condensate cooler by the light benzene pipeline, the condensate cooler outlet is connected to the light benzene medial launder, washes benzene tower side line and connects the naphthalene fairlead.
Coking crude benzene, containing benzene Separation of Water treatment process, carries out according to the following steps:
(i) the crude benzol Separation of Water containing the benzene oil-containing of carrying the crude benzol production process to separate by crude benzol Separation of Water blow-down pipe is to underground emptying groove;
(ii) open the control valve that crude benzol Separation of Water transfer lime is provided with, open the valve of cyclic ammonia water pipe cocycle aqua ammonia pump front and back, open vacuum primingpump and cyclic ammonia water pump, the crude benzol Separation of Water is sent to coke oven collecting main cooling down high-temperature coal gas with ammoniacal liquor;
(iii) in cooling coal gas, rely on the coal gas of high temperature to be heated the crude benzol Separation of Water containing benzene and naphthalene, benzene and naphthalene heated volatile are sneaked in coal gas, wherein volatilization is sneaked into the benzene gas entered in coal gas and directly by the gas blower positive delivery, after thionizer and sulphur ammonium tower, is arrived and wash the benzene operation together with coke-oven gas with naphthalene gas, adopt packing type to wash the benzene tower washing the benzene operation, and adopt the washing oil of 25～28 ℃ to be washed coal gas, coal gas enters from bottom in washing the benzene tower, top out, washing oil is sprayed coal gas from top to bottom in washing the benzene tower, utilize washing oil and benzene, the principle that toluene and naphthalene dissolve each other, the benzene in coal gas, toluene and naphthalene absorb, dissolve in washing oil, absorbed benzene, the washing oil of naphthalene (being called rich oil) is again by the rich oil pump delivery, after preheating, from the debenzolizing tower middle and lower part, enter, and use steam to steam and blow rich oil in the debenzolizing tower bottom, benzene, naphthalene steams and produces by boasting from washing oil, adopt again water cooler that the benzene condensation is reclaimed, draw collection according to the boiling point of naphthalene at the top of debenzolizing tower tower tray simultaneously, reach recovery benzene, the purpose of naphthalene, water and oils are sneaked into the tar system, with tar ammonia mixture ammoniacal liquor clarifying tank, carry out static layering at ammoniacal liquor clarification trough inner water and oil according to immiscible principle, water, due to light specific gravity, floats over top, continuously flows into oil-circulating ammonia water tank, tar is due to than great, sink to bottom, regularly, by the past tar medial launder of row of conduits, realize oily water separation.
The technical scheme that the present invention further limits is:
Aforesaid coking crude benzene is containing benzene Separation of Water treatment system, and the venting port that the cyclic ammonia water pump has connects a road pipeline to oil-circulating ammonia water tank, and vent valve is installed on pipeline, regularly the cyclic ammonia water pump is carried out to exhaust.In order to prevent that benzene gas from producing cavitation erosion at the cyclic ammonia water pump, is discharged into the cyclic ammonia water pump to a small amount of benzene gas accumulated in pump.
Aforesaid coking crude benzene is containing benzene Separation of Water treatment process, and in coke oven collecting main, gas temperature is 780～850 ℃.
The invention has the beneficial effects as follows: the present invention is by the existing equipment in coke-oven plant and condition, take full advantage of original equipment the crude benzol Separation of Water is carried out to purifying treatment, the processing of crude benzol Separation of Water of the present invention is owing to making benzene and naphthalene vaporization in Separation of Water by coal gas of high temperature as carrier, and the efficiency of removing benzene, naphthalene is high.Remove benzene, naphthalene and oil separating water is directly processed to ammonia still process with ammoniacal liquor simultaneously, can not produce secondary pollution, solved Separation of Water in the past to the benzene gas pollution problem of inhaling gas line or mechanizeding ammonia clarifying groove and producing simultaneously, the environment that improves operation site has been played an important role.
The accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
Embodiment
Embodiment 1
A kind of coking crude benzene of the present embodiment is containing benzene Separation of Water treatment system, connect as shown in Figure 1, a kind of coking crude benzene is containing benzene Separation of Water treatment system, comprise underground emptying groove 22, oil-circulating ammonia water tank 28, coke oven collecting main 2 and cyclic ammonia water pump 25, coke oven collecting main 2 connects coke oven 1, cyclic ammonia water pump 25 is arranged on the cyclic ammonia water pipe 3 that oil-circulating ammonia water tank 28 is connected to coke oven collecting main 2, the front and back of cyclic ammonia water pipe 3 cocycle aqua ammonia pumps 25 all are provided with valve, the fluid inlet that underground emptying groove 22 has connects crude benzol Separation of Water blow-down pipe 21, the crude benzol Separation of Water containing the benzene oil-containing that crude benzol Separation of Water blow-down pipe 21 carries the crude benzol production process to separate is to underground emptying groove 22, the crude benzol Separation of Water transfer lime 24 that is connected to underground emptying groove 22 inner bottom parts is connected to the import of cyclic ammonia water pump 25, be provided with vacuum primingpump 23 on crude benzol Separation of Water transfer lime 24, crude benzol Separation of Water transfer lime 24 between vacuum primingpump 23 and cyclic ammonia water pump 25 is provided with control valve 27, and cyclic ammonia water pump 25 is delivered to coke oven collecting main 2 to the crude benzol Separation of Water with ammoniacal liquor, the outlet of coke oven collecting main 2 connects gas-liquid separator 4, the outlet at bottom of gas-liquid separator 4 connects ammoniacal liquor clarifying tank 30 by mixed solution pipeline 5, the top outlet of gas-liquid separator 4 connects gas blower 7 by cooling oil eliminator 6, the outlet at bottom of ammoniacal liquor clarifying tank 30 is connected to tar medial launder 29, and the top outlet of ammoniacal liquor clarifying tank 30 is connected to oil-circulating ammonia water tank 28, gas blower 7 outlets connect successively thionizer 8, sulphur ammonium tower 9 and wash benzene tower 11, the outlet at bottom of washing benzene tower 11 is connected to debenzolizing tower 13 by rich oil pump 20 and oil gas heat exchanger 19 successively, the top exit of debenzolizing tower 13 is connected to light benzene condensate cooler 15 by light benzene pipeline 14, condensate cooler 15 outlets are connected to light benzene medial launder 17, wash benzene tower 11) side line connection naphthalene fairlead 18.
The crude benzol Separation of Water directly sprays by shower nozzle, with coal gas of high temperature, contact, benzene, how to wait volatile organic matter at the interior coke-oven gas of directly sneaking into of effuser 2, at the interior coal gas of effuser 2 and ammoniacal liquor, the tar mixed solution pipeline that exists together, wherein coal gas is on pipeline, flow to gas blower 7 under the suction of gas blower 7, ammoniacal liquor, the mixed solutions such as tar are in the bottom of pipeline, rely on the effect of gravity flow to flow to mechanizeding ammonia clarifying groove 30, at gas-liquid separator, 4 places carry out gas-liquid separation, coal gas enters gas line, through cooling, be sent to thionizer 8 and sulphur ammonium tower 9 by gas blower 7 after oil removing, finally reach and wash the benzene operation, at the interior employing washing oil of benzene tower 11 of washing of washing the benzene operation, coal gas is sprayed, the organism such as the benzene in absorption coal gas and naphthalene, absorb benzene and how to have waited organic washing oil (title rich oil) to be carried by rich oil pump 20, through oil gas heat exchanger, poor oil-rich heat exchanger and diamond heating to 180～185 ℃ enter debenzolizing tower 13, at the interior employing steam of debenzolizing tower 13, rich oil is steamed and blows, make washing oil and benzene, naphthalene separates, benzene steams from debenzolizing tower 13 tops, after light benzene condensate cooler 15 is cooling, with light benzene medial launder 17, collect, naphthalene is drawn from the tower tray of debenzolizing tower side line, with groove, collected, the incoagulability dispersing gas on groove top enters after vent gas washing system is processed and directly diffuses.Ammoniacal liquor, tar mixed solution arrive mechanizeding ammonia clarifying groove 30 along pipeline self after gas-liquid separator 4 places carry out gas-liquid separation, carry out static layering at mechanizeding ammonia clarifying groove 30 Nei Shui and oil according to immiscible principle, water is due to light specific gravity, float over top, continuously flow into oil-circulating ammonia water tank 28, tar, due to than great, sinks to bottom, regularly, by the past tar medial launder 29 of row of conduits, realize oily water separation.
In order to prevent that benzene gas from producing cavitation erosion at centrifugal pump of horizontal axis, upper air vent at cyclic ammonia water pump 25 connects a road pipeline to oil-circulating ammonia water tank 28, and vent valve 26 is installed, and regularly cyclic ammonia water pump 25 is carried out to exhaust, a small amount of benzene gas accumulated in pump is discharged into to oil-circulating ammonia water tank 28.
Coking crude benzene, containing benzene Separation of Water treatment process, carries out according to the following steps:
(i) the crude benzol Separation of Water containing the benzene oil-containing of carrying the crude benzol production process to separate by crude benzol Separation of Water blow-down pipe 21 is to underground emptying groove 22;
(ii) open the control valve 26 that crude benzol Separation of Water transfer lime 24 is provided with, open the valve of cyclic ammonia water pipe 3 cocycle aqua ammonia pump 25 front and back, open vacuum primingpump 23 and cyclic ammonia water pump 25, the crude benzol Separation of Water is sent to coke oven collecting main 2 cooling down high-temperature coal gas with ammoniacal liquor;
(iii) in cooling coal gas, rely on the coal gas of high temperature to be heated the crude benzol Separation of Water containing benzene and naphthalene, the interior gas temperature of coke oven collecting main 2 is 780～850 ℃, benzene and naphthalene heated volatile are sneaked in coal gas, wash the benzene operation with coal gas Dao Hou road, reclaim the organism such as benzene wherein and naphthalene, wherein volatilization sneak into the benzene gas that enters in coal gas and naphthalene gas together with coke-oven gas directly by gas blower 7 positive delivery through desulfurization process 8, the benzene operation is washed in the 9 rear arrival of sulphur ammonium operation, adopt packing type to wash benzene tower 11 washing the benzene operation, and adopt the washing oil of 25～28 ℃ to be washed coal gas, coal gas enters from bottom in washing the benzene tower, top out, washing oil is sprayed coal gas from top to bottom in washing the benzene tower, utilize washing oil and benzene, the principle that the organism such as toluene and naphthalene dissolves each other, the benzene in coal gas, toluene and naphthalene absorb, dissolve in washing oil.Absorbed the washing oil (being called rich oil) of benzene, naphthalene by carrying by rich oil pump 20 again, after preheating, from debenzolizing tower 13 middle and lower parts, enter, and use steam to steam and blow rich oil in debenzolizing tower 13 bottoms, benzene, naphthalene are steamed and produce by boasting from washing oil, adopt again water cooler 15 that the benzene condensation is reclaimed, draw collection according to the boiling point of naphthalene at the top of debenzolizing tower 13 tower tray, reach the purpose that reclaims benzene, naphthalene simultaneously.Water and oils are sneaked into the tar system, with tar ammonia mixture mechanizeding ammonia clarifying groove 30, carry out static layering at mechanizeding ammonia clarifying groove 30 Nei Shui and oil according to immiscible principle, water, due to light specific gravity, floats over top, continuously flows into oil-circulating ammonia water tank 28, tar is due to than great, sink to bottom, regularly, by the past tar medial launder 29 of row of conduits, realize oily water separation.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (3)
1. a coking crude benzene is containing benzene Separation of Water treatment system, comprise underground emptying groove (22), oil-circulating ammonia water tank (28), coke oven collecting main (2) and cyclic ammonia water pump (25), described cyclic ammonia water pump (25) is arranged on the cyclic ammonia water pipe (3) that oil-circulating ammonia water tank (28) is connected to coke oven collecting main (2), the front and back of described cyclic ammonia water pipe (3) cocycle aqua ammonia pump (25) all are provided with valve, it is characterized in that: the fluid inlet that described underground emptying groove (22) has connects crude benzol Separation of Water blow-down pipe (21), the crude benzol Separation of Water containing the benzene oil-containing that described crude benzol Separation of Water blow-down pipe (21) carries the crude benzol production process to separate is to underground emptying groove (22), the crude benzol Separation of Water transfer lime (24) that is connected to described underground emptying groove (22) inner bottom part is connected to the import of cyclic ammonia water pump (25), be provided with vacuum primingpump (23) on described crude benzol Separation of Water transfer lime (24), crude benzol Separation of Water transfer lime (24) between vacuum primingpump (23) and cyclic ammonia water pump (25) is provided with control valve (27), and cyclic ammonia water pump (25) is delivered to coke oven collecting main (2) to the crude benzol Separation of Water with ammoniacal liquor, the outlet of described coke oven collecting main (2) connects gas-liquid separator (4), the outlet at bottom of described gas-liquid separator (4) connects ammoniacal liquor clarifying tank (30) by mixed solution pipeline (5), the top outlet of gas-liquid separator (4) connects gas blower (7) by cooling oil eliminator (6), the outlet at bottom of described ammoniacal liquor clarifying tank (30) is connected to tar medial launder (29), and the top outlet of ammoniacal liquor clarifying tank (30) is connected to oil-circulating ammonia water tank (28), described gas blower (7) outlet connects successively thionizer (8), sulphur ammonium tower (9) and washes benzene tower (11), the described outlet at bottom of washing benzene tower (11) is connected to debenzolizing tower (13) by rich oil pump (20) and oil gas heat exchanger (19) successively, the top exit of debenzolizing tower (13) is connected to light benzene condensate cooler (15) by light benzene pipeline (14), condensate cooler (15) outlet is connected to light benzene medial launder (17), and described benzene tower (11) side line of washing connects naphthalene fairlead (18).
2. coking crude benzene as claimed in claim 1 is containing benzene Separation of Water treatment system, it is characterized in that: the venting port that cyclic ammonia water pump (25) has connects a road pipeline to oil-circulating ammonia water tank (28), and vent valve (26) is installed on pipeline, regularly cyclic ammonia water pump (25) is carried out to exhaust.
3. the coking crude benzene for the described system of claim 1 contains benzene Separation of Water treatment process, it is characterized in that: carry out according to the following steps:
(i) the crude benzol Separation of Water containing the benzene oil-containing of carrying the crude benzol production process to separate by crude benzol Separation of Water blow-down pipe (21) is to underground emptying groove (22);
(ii) open the control valve (27) that crude benzol Separation of Water transfer lime (24) is provided with, open the valve of cyclic ammonia water pipe (3) cocycle aqua ammonia pump (25) front and back, open vacuum primingpump (23) and cyclic ammonia water pump (25), the crude benzol Separation of Water is sent to coke oven collecting main (2) cooling down high-temperature coal gas with ammoniacal liquor;
(iii) in cooling coal gas, rely on the coal gas of high temperature to be heated the crude benzol Separation of Water containing benzene and naphthalene, benzene and naphthalene heated volatile are sneaked in coal gas, wherein volatilization is sneaked into the benzene gas entered in coal gas and directly by gas blower (7) positive delivery, after thionizer (8) and sulphur ammonium tower (9), is arrived and wash the benzene operation together with coke-oven gas with naphthalene gas, adopt packing type to wash benzene tower (11) washing the benzene operation, and adopt the washing oil of 25～28 ℃ to be washed coal gas, coal gas enters from bottom in washing the benzene tower, top out, washing oil is sprayed coal gas from top to bottom in washing the benzene tower, utilize washing oil and benzene, the principle that toluene and naphthalene dissolve each other, the benzene in coal gas, toluene and naphthalene absorb, dissolve in washing oil, absorbed benzene, the washing oil of naphthalene is carried by rich oil pump (20) again, after preheating, from debenzolizing tower (13) middle and lower part, enter, and use steam to steam and blow rich oil in debenzolizing tower (13) bottom, benzene, naphthalene steams and produces by boasting from washing oil, adopt again condensate cooler (15) that the benzene condensation is reclaimed, draw collection according to the boiling point of naphthalene at the top tower tray of debenzolizing tower (13) simultaneously, reach recovery benzene, the purpose of naphthalene, water and oils are sneaked into the tar system, with tar ammonia mixture ammoniacal liquor clarifying tank (30), carry out static layering at ammoniacal liquor clarifying tank (30) Nei Shui and oil according to immiscible principle, water, due to light specific gravity, floats over top, continuously flows into oil-circulating ammonia water tank (28), tar is due to than great, sink to bottom, regularly, by the past tar medial launder (29) of row of conduits, realize oily water separation.
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| CN103408182A (en) * | 2013-08-23 | 2013-11-27 | 济钢集团有限公司 | Process for deoiling residual ammonia water |
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| CN107021590B (en) * | 2017-04-24 | 2020-02-21 | 莱芜市泰山焦化有限公司 | Method for reducing harmful components in ammonia distillation wastewater through step-by-step separation based on high dry distillation of coal cakes |
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